test(largest): create the folders and remove them when running the test

sh/tests/largest_test.sh

@@ -7,6 +7,29 @@ IFS='
 FILENAME="student/largest.sh"
 script_dirS=$(cd -P "$(dirname "$BASH_SOURCE")" &>/dev/null && pwd)
 
+rm -rf largest-dir
+mkdir largest-dir
+cd largest-dir
+
+directories=(folder1 folder2/aa folder2/ba/aa folder2/aa/ba)
+for dir in "${directories[@]}"; do
+  mkdir -p "$dir"
+done
+
+files=(.abc 34 folder1/ab 4 folder1/ac 2 folder1/az 3 folder1/bz 3 \
+folder1/cz 9 folder1/.hello 21 folder1/za! 3 folder2/ab 7 folder2/ac 0 \
+folder2/alphabet 0 folder2/az 0 folder2/bz 4 folder2/cz 0 folder2/za! 28 \
+folder2/aa/aa 3 folder2/aa/az 4 folder2/aa/.salut 7 folder2/aa/ba/ab 0 \
+folder2/aa/ba/bz 0 folder2/ba/ac 0 folder2/ba/alphabetz 0 folder2/ba/.ola 17 \
+folder2/ba/aa/alphabetz! 0 folder2/ba/aa/.ciao 7 folder2/ba/aa/cz 0 \
+folder2/ba/aa/za! 0)
+
+for ((i=0; i<${#files[@]}; i+=2)) do
+  dd if=/dev/zero of="${files[i]}" bs=1 count="${files[i + 1]}" 2> /dev/null
+done
+
+cd ..
+
 challenge () {
     submitted=$(cd "$1" && bash "$script_dirS"/"$FILENAME")
     expected=$(cd "$1" && bash "$script_dirS"/solutions/largest.sh)
@@ -22,3 +45,5 @@ fi
 challenge largest-dir/folder1
 challenge largest-dir/folder2
 challenge largest-dir
+
+rm -rf largest-dir